/*
 * Jeon Seonghun Portfolio Design System
 * Direction: precision monochrome + signal color
 * Loaded after page-local CSS; owns shared visual decisions.
 */

:root {
  --ds-canvas: #f6f7f9;
  --ds-surface: #ffffff;
  --ds-surface-strong: #111318;
  --ds-ink: #111318;
  --ds-text: #454b55;
  --ds-muted: #6c7480;
  --ds-line: #d8dde5;
  --ds-brand: #c2412d;
  --ds-brand-soft: #fbe7e2;
  --ds-signal: #275efe;
  --ds-font-sans: "Pretendard Variable", Pretendard, "Source Sans 3", sans-serif;
  --ds-font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --ds-space-1: 4px;
  --ds-space-2: 8px;
  --ds-space-3: 12px;
  --ds-space-4: 16px;
  --ds-space-5: 24px;
  --ds-space-6: 32px;
  --ds-space-7: 48px;
  --ds-space-8: 64px;
  --ds-space-9: 96px;
  --ds-space-10: 128px;
  --ds-radius-sm: 2px;
  --ds-radius-md: 6px;
  --ds-radius-pill: 999px;
  --ds-content: 1180px;
  --ds-reading: 720px;
  --ds-fast: 160ms;
  --ds-ease: cubic-bezier(.2, 0, 0, 1);

  --bg: var(--ds-canvas);
  --surface: var(--ds-surface);
  --ink: var(--ds-ink);
  --muted: var(--ds-muted);
  --border: var(--ds-line);
  --accent: var(--ds-brand);
  --r-card: var(--ds-radius-sm);
  --r-btn: var(--ds-radius-pill);
  --max-w: var(--ds-content);
  --section-gap: var(--ds-space-9);
  --font: var(--ds-font-sans);
  --mono: var(--ds-font-mono);
}

html { color-scheme: light; background: var(--ds-canvas); }

body {
  background: var(--ds-canvas);
  color: var(--ds-ink);
  font-family: var(--ds-font-sans);
  font-size: 1.0625rem;
  line-height: 1.72;
}

::selection { background: var(--ds-brand); color: #fff; }

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--ds-brand) 58%, transparent);
  outline-offset: 4px;
}

.wrap {
  width: min(100% - 48px, var(--ds-content));
  max-width: none;
  padding-inline: 0;
}

/* Navigation */
.band { background: var(--ds-canvas); }

nav {
  min-height: 78px;
  padding: 0;
  border-bottom: 1px solid color-mix(in srgb, var(--ds-ink) 16%, transparent);
}

.nav-brand {
  color: var(--ds-ink);
  font-size: 1rem;
  font-weight: 680;
  letter-spacing: -.035em;
}

.nav-links { gap: 26px; }

.nav-links a {
  color: var(--ds-muted);
  font-size: .875rem;
  font-weight: 560;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] { color: var(--ds-brand); }

.nav-cta {
  min-height: 40px;
  padding: 9px 18px;
  border-radius: var(--ds-radius-pill);
  background: var(--ds-ink);
  color: #fff !important;
}

/* Shared page hero */
.band > .wrap > .hero { padding-top: clamp(64px, 9vw, 112px); }

.eyebrow,
.sec-eyebrow,
.group-chapter,
.cell-tag,
.outro-label,
.record-label,
.nav-proj-hint {
  color: var(--ds-brand);
  font-family: var(--ds-font-sans);
  font-size: .72rem;
  font-weight: 560;
  letter-spacing: .09em;
  text-transform: uppercase;
}

h1, h2, h3 { color: var(--ds-ink); text-wrap: balance; }

.band h1 {
  font-weight: 660;
  letter-spacing: -.05em;
  line-height: 1.02;
}

.hero-sub,
.proj-context,
.project-sub,
.prose-body,
.arch-body,
.cell-desc p,
.case-row .row-body,
.tl-bullets,
.record-sub { color: var(--ds-text); }

.hero-meta,
.status-badge {
  color: var(--ds-muted);
  font-family: var(--ds-font-sans);
  font-size: .82rem;
  letter-spacing: 0;
  text-transform: none;
}

.status-dot,
.status-dot--live,
.status-dot--update {
  width: 7px;
  height: 7px;
  background: var(--ds-brand);
}

/* Buttons and links */
.btn-primary {
  min-height: 44px;
  padding: 11px 21px;
  border-radius: var(--ds-radius-pill);
  background: var(--ds-ink);
  color: #fff;
  font-weight: 580;
}

.btn-primary:hover { background: var(--ds-brand); }

.btn-text,
.project-link,
.tl-proj-link,
.currently-link,
.proj-cta,
.record-card,
.nav-proj-title { color: var(--ds-brand); }

/* Section rhythm */
.section { padding-block: var(--ds-space-9); }

.section--surface {
  background: var(--ds-surface);
  border-color: var(--ds-line);
}

.section--border { border-color: var(--ds-line); }

.section h2,
.group-header h2 {
  font-weight: 650;
  letter-spacing: -.035em;
}

/* Metrics */
.metrics {
  background: var(--ds-surface-strong);
  border-color: var(--ds-surface-strong);
}

.metric { border-color: rgba(255,255,255,.16); }
.metric-val { color: #f8f7f3; font-family: var(--ds-font-sans); }
.metric-lbl { color: #aab1b3; }

/* Cards */
.projects-grid,
.proj-grid,
.cases,
.cases-stack { gap: var(--ds-space-4); }

.project-card,
.proj-card,
.cell,
.case-cell,
.record-card {
  border: 1px solid var(--ds-line);
  border-radius: var(--ds-radius-sm);
  background: var(--ds-surface);
  box-shadow: none;
}

.project-card:hover,
.proj-card:hover,
.cell:hover,
.case-cell:hover {
  border-color: var(--ds-brand);
  background: #fff;
}

.proj-card--live { border-color: var(--ds-brand); }

.project-title,
.proj-title,
.cell-title,
.tl-company,
.prose-heading,
.outro-title {
  font-weight: 640;
  letter-spacing: -.025em;
}

.tag {
  border-color: var(--ds-line);
  border-radius: var(--ds-radius-pill);
  color: var(--ds-muted);
  background: transparent;
  font-family: var(--ds-font-sans);
  font-size: .75rem;
}

/* Technical evidence */
.code-panel,
.code-contact {
  overflow: hidden;
  border: 1px solid #2f3d3a;
  border-radius: var(--ds-radius-sm);
  background: #111817;
  box-shadow: none;
}

.code-filename {
  color: #a9bbb6;
  border-color: #2f3d3a;
  background: #182320;
}

.code-body,
.code-contact-body {
  color: #e5ebe8;
  font-family: var(--ds-font-mono);
}

.code-panel .code-filename {
  background: #182320;
  border-bottom-color: #2f3d3a;
}

.code-panel .code-body,
.code-contact .code-contact-body {
  background: #111817;
}

.ck { color: #79d8ba; }
.ct { color: #e7b36c; }
.cn { color: #9bc7ff; }
.cm, .cc-comment { color: #8d9d98; }

.phone-wrap,
.cell-visual {
  border-radius: var(--ds-radius-sm);
  background: var(--ds-brand-soft);
}

/* Work */
.timeline::before { background: var(--ds-line); }

.tl-entry::before {
  border-color: var(--ds-canvas);
  background: var(--ds-brand);
}

.tl-period {
  color: var(--ds-brand);
  font-family: var(--ds-font-sans);
}

.tl-note { color: var(--ds-muted); }

/* About */
.prose-grid,
.arch-item { border-color: var(--ds-line); }

.prose-label,
.arch-label {
  color: var(--ds-brand);
  font-family: var(--ds-font-sans);
}

.prose-quote {
  border-left-color: var(--ds-signal);
  color: var(--ds-ink);
}

/* Footer and cross-navigation */
.nav-strip,
.outro-section,
.contact-cta,
.cta-section {
  background: var(--ds-surface);
  border-color: var(--ds-line);
}

footer {
  background: var(--ds-canvas);
  border-color: var(--ds-line);
}

.footer-brand { color: var(--ds-ink); font-weight: 640; }
.footer-nav a, .footer-note { color: var(--ds-muted); }

.fi {
  transition-duration: 360ms;
  transition-timing-function: var(--ds-ease);
}

/*
 * Page shells
 * Page-local CSS previously gave every page a different header geometry.
 * These rules are intentionally more specific and define the final shell.
 */
.page-home .band,
.page-standard .band,
.page-case .band {
  border: 0;
}

.page-home .band nav,
.page-standard .band nav,
.page-case .band nav {
  min-height: 78px;
  padding: 0;
  border-bottom: 1px solid rgba(21,24,29,.16);
}

.page-home .nav-brand,
.page-standard .nav-brand,
.page-case .nav-brand {
  color: var(--ds-ink);
  font-size: 1rem;
  font-weight: 680;
  letter-spacing: -.035em;
}

.page-home .nav-links,
.page-standard .nav-links,
.page-case .nav-links {
  align-items: center;
  gap: 26px;
}

.page-home .nav-links a,
.page-standard .nav-links a,
.page-case .nav-links a {
  color: var(--ds-muted);
  font-size: .875rem;
  font-weight: 560;
}

.page-home .nav-links a[aria-current="page"],
.page-standard .nav-links a[aria-current="page"],
.page-case .nav-links a[aria-current="page"] {
  color: #c2412d !important;
}

.page-home .nav-links a[aria-current="page"]::after,
.page-standard .nav-links a[aria-current="page"]::after,
.page-case .nav-links a[aria-current="page"]::after {
  background: #c2412d !important;
}

.page-home .nav-links a:hover,
.page-standard .nav-links a:hover,
.page-case .nav-links a:hover {
  color: #c2412d !important;
}

.page-home .nav-cta,
.page-standard .nav-cta,
.page-case .nav-cta {
  min-height: 40px;
  padding: 9px 18px;
  border-radius: var(--ds-radius-pill);
  background: var(--ds-ink);
  color: #fff !important;
}

/* Projects, Work and About share one page header. */
.page-standard .band {
  min-height: 430px;
  padding-bottom: 72px;
  background: var(--ds-canvas);
}

.page-standard .band .hero {
  display: block;
  max-width: 760px;
  min-height: 0;
  padding-top: 82px;
}

.page-standard .band .eyebrow { margin-bottom: 22px; }

.page-standard .band h1 {
  margin: 0 0 24px;
  font-size: clamp(3.25rem, 6vw, 5.2rem);
  font-weight: 660;
  line-height: .98;
  letter-spacing: -.055em;
}

.page-standard .band .hero-sub {
  max-width: 650px;
  margin: 0;
  color: var(--ds-text);
  font-size: 1.0625rem;
  line-height: 1.72;
}

/* Case studies use the same shell with an extra metadata row. */
.page-case .band {
  min-height: 470px;
  padding-bottom: 76px;
  background:
    radial-gradient(circle at 84% 22%, rgba(39,94,254,.07), transparent 28%),
    var(--ds-canvas);
}

.page-case .band .hero {
  display: block;
  max-width: 900px;
  min-height: 0;
  padding-top: 76px;
}

.page-case .band .eyebrow { margin-bottom: 22px; }

.page-case .band h1 {
  margin: 0 0 20px;
  font-size: clamp(3.25rem, 6vw, 5.2rem);
  font-weight: 660;
  line-height: .98;
  letter-spacing: -.055em;
}

.page-case .band .hero-meta {
  margin-bottom: 16px;
  color: var(--ds-muted);
}

.page-case .band .hero-sub {
  max-width: 720px;
  margin: 0;
  color: var(--ds-text);
  font-size: 1.0625rem;
  line-height: 1.72;
}

/* Interior section language */
.page-standard main > .section,
.page-case main > .section {
  padding-block: var(--ds-space-9);
}

.page-standard .group-header,
.page-case .group-header,
.page-standard .sec-header-row,
.page-case .sec-header-row {
  margin-bottom: var(--ds-space-7);
}

.page-standard .section h2,
.page-case .section h2 {
  font-size: clamp(2rem, 3.6vw, 3.2rem);
  font-weight: 650;
  line-height: 1.08;
  letter-spacing: -.045em;
}

.page-standard .proj-card,
.page-case .cell,
.page-case .case-cell,
.page-case .record-card {
  border-color: var(--ds-line);
  border-radius: var(--ds-radius-sm);
  background: var(--ds-surface);
  box-shadow: none;
}

.page-standard footer,
.page-case footer,
.page-home footer {
  border-top: 1px solid var(--ds-line);
  background: var(--ds-canvas);
}

/* Homepage color application */
.page-home .band {
  background:
    radial-gradient(circle at 78% 24%, rgba(39,94,254,.065), transparent 32%),
    var(--ds-canvas);
}

.page-home .case-visual {
  color: #f7f8fa;
  background: #111318;
  border-color: #111318;
  box-shadow: 18px 18px 0 rgba(39,94,254,.10);
}

.page-home .case-visual::before {
  border-color: rgba(255,255,255,.20);
  box-shadow:
    0 0 0 42px rgba(255,255,255,.035),
    0 0 0 84px rgba(255,255,255,.018);
}

.page-home .case-live::before {
  background: #45a47b;
  box-shadow: 0 0 0 5px rgba(69,164,123,.14);
}

.page-home .flow-node {
  border-color: rgba(255,255,255,.24);
  background: rgba(255,255,255,.04);
  color: #eef1f5;
}

.page-home .flow-arrow,
.page-home .case-link span {
  color: var(--ds-signal);
}



@media (max-width: 768px) {
  :root { --section-gap: var(--ds-space-8); }
  .wrap { width: min(100% - 36px, var(--ds-content)); }
  nav { min-height: 68px; }
  .section { padding-block: var(--ds-space-8); }

  .page-home .band nav,
  .page-standard .band nav,
  .page-case .band nav {
    flex-wrap: wrap;
    min-height: 0;
    padding-block: 14px 12px;
  }

  .page-home .nav-brand,
  .page-standard .nav-brand,
  .page-case .nav-brand {
    width: 100%;
    padding-bottom: 12px;
  }

  .page-home .nav-links,
  .page-standard .nav-links,
  .page-case .nav-links {
    width: 100%;
    justify-content: space-between;
    gap: 8px;
    padding-top: 12px;
    border-top: 1px solid rgba(21,24,29,.10);
  }

  .page-home .nav-links li,
  .page-standard .nav-links li,
  .page-case .nav-links li {
    display: list-item;
  }

  .page-home .nav-links a,
  .page-standard .nav-links a,
  .page-case .nav-links a {
    font-size: .78rem;
    white-space: nowrap;
  }

  .page-home .nav-cta,
  .page-standard .nav-cta,
  .page-case .nav-cta {
    min-height: 34px;
    padding: 7px 12px;
  }

  .page-standard .band,
  .page-case .band {
    min-height: 360px;
    padding-bottom: 56px;
    background: var(--ds-canvas);
  }

  .page-standard .band .hero,
  .page-case .band .hero {
    padding-top: 56px;
  }

  .page-standard .band h1,
  .page-case .band h1 {
    font-size: clamp(2.7rem, 13vw, 4rem);
  }

  .page-standard main > .section,
  .page-case main > .section {
    padding-block: var(--ds-space-8);
  }
}

@media (max-width: 480px) {
  .wrap { width: min(100% - 28px, var(--ds-content)); }
  .nav-links { gap: 6px; }
  .nav-cta { padding-inline: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}